Spinning-machine



Patented Nov. 29, I898.

No 6l4,834

(No Model) ATENT Prion.

MALCOLM CAMPBELL, OF BOSTON, DIASSAOIIUSETTS.

SPINNING- MACHINE.

SPECIFICATION forming part of Letters Patent No. 614,834, dated November 29, 1898.

Application filed December 15, 1897. Serial No. 661,925. (No model.)

To on whom it may concern:

Beit known that I, MALCOLM CAMPBELL, of Boston, in the county of Suffolk and State of Massachusetts,have invented certain new and useful Improvements in Spinning-Machines,

of which the following is a specification.

This invention has relation to spinning-machines, and has for its object to provide certain improvements therein by means of which the yarn or wool may be drawn out or reduced to a greater extent and with greater efficiency than heretofore.

To this end the invention consists of a spinning-machine provided with certain improvements illustrated upon the drawings and which I shall now proceed to describe in detail and then point out in the claims hereunto annexed.

Reference is to be had to the accompanying drawings, and to the letters and figures marked thereon, formingapart of this specification, the same letters and figures designating the same parts or features, as the case may be, wherever they occur.

Of the drawings, Figure 1 represents a portion of a spinning-machine equipped with my improvements. Fig. 2 represents in longitudinal vertical section a twister-head constructed in accordance with the invention. Fig. 3 represents in side elevation another form of twister-head in which the invention may be embodied. Fig. 4 represents a vertical longitudinal section through the same. Figs. 5 and 6 represent front and rear elevations of the same.

Referring to the drawings, a indicates the standard or frame of the machine, upon the upper portion of which are mounted supports a for the top rolls a 0, the yarn being guided thereto by the guides 0?.

It will be understood that although I have shown only one set of rolls a they are arranged in series along the top of the frame, so that a large number of threads are spun at the same time. These top rolls a a are driven by any of the means (not shown) which are ordinarily employed for this purpose, and the yarn passes therefrom to the twister-head (indicated as awhole byb) mounted on the frame below the top rolls. Below the twister-head b are the lower drawing-rolls c c, which are driven continuously by any ordinary device. (Not shown.)

' The twister-head is supported in bearings mounted upon the frame CL, and it is held in said bearings by the pressure of the driving belts or cords around the whirls. The said head is arranged at a slight inclination relati vely to the plane of the axes of the top drawing-rolls, so that the yarn 2 is at an angle to the axis of the head a little greater than a right angle.

The twister-head comprises two portions, one above the other, of which portions the upper one operates to twist the yarn between it and the top drawing-rolls and to automatically draw it out and reduce it, and the lower one twists the yarn between the lower drawing-rolls and the said upper portion of the twister-head.

The lower portion of the twister-head consists of the sleeve 1), having formed thereon a relatively small whirl b and provided at its lower end with the fixed jaw Z1 of the grippers, the movable jaw 19 of which is pivoted at b thereto. Projecting outwardly from the movable jaw of the grippers is a lug b in which is inserted an upwardly-extending pin b having adjustably secured thereto a governor-Weight b \Vhen the sleeve is rotated, the weight b is thrown out by centrifugal action and the yarn is gripped between two jaws of the gripper, the pressure of the movable against the stationary jaw being varied in accordance with the speed at which the said jaw is rotated.

The central aperture through the sleeve is somewhat enlarged in the upper portion thereof to receive the downwardly-extending tubular portion 01 of the upper half of the twisterhead. The said tubular portion d projects down from a whirl d, which is double the size of that indicated at 11 and above the whirl cl is a hub-like portion (2 journaled in a bearing. The spindle end of the said portion 01 is tapering, as indicated at d there being a duct d leading into the bore of the said portion from the base of the tapering portion d The yarn passes through the said duct 61 and through the central aperture of the twister-head between the gripper-jaws b b to the lower drawing-rolls c c, and it will be noted that the extremities of the grippers b b are in close proximity to the point of contact of the said rolls.

Bands 6 e are employed for driving the whirls d (Z the latter being driven at twice the speed of the former. As is well known it is extremely difficult and practically impossible to draw out a woolen thread without twisting it to give it strength as it reduces in size, and hence the thread should be twisted at all points between the top rolls a a and the lower drawing -rolls 0 c, for otherwise the thread will part or break. Hence the object of this invention as embodied in the apparatus which I have just described is to insure the twisting of the thread or yarn at all points between the said rollers. As the whirl (Z is rotated the tapering upper portion 61 intermittingly engages the thread and stretches it. In addition to drawing out the threads this twists it at points between the month of the duct (Z and the upper drawing-rolls a but unless other devices were employed below the duct (1 the yarn would pass in an untwisted state therefrom to the lower end of the twister-head, and hence the yarn would break with such frequency that the usefulness of the device would be impaired. Hence I employ the supplemental twisting device, the lower whirl b of which is driven at ahigh rate of speed, so that the grippers b b twist the thread at points between the said ducts b and the lower drawing-rolls c 0, whereby the yarn is not only stretched and drawn out by the intermittent action of the spindle-point (Z but is also twisted throughout its entire length.

In Figs. 3, 4, 5, and G I have illustrated my improved grippers for the twister-head. In the said figures the lower end of the spindle f is provided with a transverse aperture f and with a slot f, on one side of which is a continuation of the said aperture. Pivoted in the said slot and extending into the aperture is a lever f having its upper end f weighted and having at its lower end a lngf, with an aperture f adapted to register with the throat or longitudinal aperture through the spindle. \Vhen the twister-head is rotated, the outer end f is thrown outward by centrifugal action and the lower end is come-- quently thrown inward past the central longitudinal line of the spindle, so as to force the yarn against the inner wall of the throat and retard its movement. In this way a suitable tension device is provided which grips the yarn sufficiently to twist it as the spindle rotates.

What I claim is- 1. Aspinning-machine comprising top rolls, lower drawing-rolls, and a twisterhead provided with means for stretching or drawing out the thread, and means for twisting the thread at all the points between the said rolls.

2. A spinning-m achine comprising top rolls, lower drawing-rolls, and a twister-head interposed between said rolls, the said twisterhead being provided wit-l1 a spindle end for acting intermittingly on the thread to stretch it, and mechanism between the spindle end and the lower drawing-roll for twisting said thread between the said points.

3. Aspinning-machine comprising top rolls, lower drawing-rolls, a twister-head arranged at a slight inclination to the plane of the axes of the said top rolls, said twister-head consisting of a rotary spindle for acting intermittingly on the thread to stretch it and a rapidly-rotating gripper between the spindle end and the lower drawing-roll for twisting yarn therebetween.

at. A twister-head for spinning-machines, having a throat and a transverse aperture leading thereinto and provided with a weight ed lever pivoted to said twister-hcad and having its lower end projecting into said aperture and transversely movable across the central line of the said throat, the said lower end of said weighted lever being provided with an eye or aperture through which the yarn may pass.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 8th day of December, A. D. 1897.

MALCOLM CAHPHE'III Witnesses:

MARCUS B. MAY, 0. O. Srncnnn. 

